/**
 * Copyright (C) 2010 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.everrest.sample.book;

import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
 * @version $Id$
 */
public class BookStorage
{
   private static int idCounter = 100;

   public synchronized String generateId()
   {
      idCounter++;
      return Integer.toString(idCounter);
   }

   private Map<String, Book> books = new ConcurrentHashMap<String, Book>();

   public BookStorage()
   {
      init();
   }

   private void init()
   {
      Book book = new Book();
      book.setTitle("JUnit in Action");
      book.setAuthor("Vincent Massol");
      book.setPages(386);
      book.setPrice(19.37);
      putBook(book);
   }

   public Book getBook(String id)
   {
      return books.get(id);
   }

   public String putBook(Book book)
   {
      String id = book.getId();
      if (id == null || id.trim().length() == 0)
      {
         id = generateId();
         book.setId(id);
      }
      books.put(id, book);
      return id;
   }

   public Collection<Book> getAll()
   {
      return books.values();
   }

   public int numberOfBooks()
   {
      return books.size();
   }
}
